DmitryKo
Veteran
I did a clean install of Win 10 15063 on a notebook with Kaveri A10 7300 two days ago and the latest driver from AMD's site had it on WDDM 2.1. Crimson 17.7.2. Maybe it's a Kaveri thing.
I'm quite sure my laptop with A10 8700P and R7 M360 reported WDDM 2.2 last time I checked.
AMD Radeon Crimson 17.x does support WDDM 2.2 - you can tell by checking the first two digits of the driver version (2.2 is supposedly for Windows Mixed Reality, but the docs are not available yet).
Not sure where DXDiag takes WDDM version from - there are no public APIs to query this, it's just tied to the specific OS release and/or SP level since Windows 7 SP1.
Each successive WDDM iteration offers a few updated DXGK DDI callbacks and expanded structures, and the driver is expected to handle whatever version is available in the current OS environment - that's why there are separate driver packages for Windows 7 (WDDM 1.1), Windows 8.1 (WDDM 1.2/1.3) and Windows 10 (WDDM 2.0/2.1/2.2). But I doubt AMD driver would use separate code paths for very minor chip revisions such as GCN1/2.
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